TEL AFA500/BSC Use and care manual

Startup
The AFA500/BSC must be eld-calibrated once
the room air supply and exhaust is balanced.
When the unit is powered up, the following
sequence of events occurs:
1. The alarm performs a self-test of its
functions, LEDs and audible alarm
(approximately 2 seconds) and then initiates
a delay timer of 30 seconds to allow the
airow sensor to stabilize.
2. During the 30-second stabilizing period, all
alarms and relay outputs are deactivated
and the red and green LEDs remain on.
3. At the end of the delay, the unit will do one
of two things:
a. If the monitor has been calibrated,
the unit enters normal operating mode
(solid green light for safe velocity, red light
and audible alarm if low velocity).
b. If the unit has not been calibrated,
the red and green LEDs will ash, the audible
alarm will be muted.
Installation &
Calibration Guide
Airow Monitor
AFA500/BSC
Calibration - Single Point (default)
1. The calibration process establishes an alarm point at 80% of the
ow rate captured during calibration. That is, the alarm value will
be 20% less than standard airow.
2. Press and hold the ENTER button for 5 seconds to enter Calibration
Mode. This is indicated by both red and green LEDs ashing with
the audible alarm beeping.
3. To initiate calibration, press and hold the ENTER and SET buttons
at the same time. The unit will sample the airow for 5 seconds,
during which time the green LED goes o and the red LED ashes.
The audible alarm continues to sound during the air sampling.
4. If calibration is successful, the monitor will give a two-tone beep at
the end of the air sample, and then automatically enter run mode.
5. If the ENTER or SET button is released during the air sampling
period, or if the airow is uctuating too much, the alarm will emit
a lower-frequency buzzing for a short period and then re-enter
calibration mode. If this occurs, press the ENTER and SET buttons
again to repeat the airow sampling.
6. If, during normal operation after a successful calibration, the airow
drops below the alarm point, the unit will go into alarm condition
(red LED ashing, audible horn beeping). Push the enter button to
temporarily mute the horn.
7. The horn can be permanently disabled by pressing and holding the
SET button for 10 seconds. The horn will sound 3 times to indicate
that it has been disabled. In Safe mode the Green LED will ash if
the horn is disabled or be solid to indicate that the horn is enabled.
To enable the horn press and hold the SET button for 10 seconds,
the horn will sound 3 times to indicate that it has been enabled.
Temperature Electronics Ltd. Unit 2, Wren Nest Road, Glossop SK13 8HB UK
T. [phone] F. [phone] E. [email protected] w. www.tel-uk.com

Installation &
Calibration Guide
Connection Details
Temperature Electronics Ltd. Unit 2, Wren Nest Road, Glossop SK13 8HB UK
T. [phone] F. [phone] E. [email protected] w. www.tel-uk.com
Operation
Horn Red LED Green LED Operation
Beep* 1 On On Power up 30 second time period to allow sensor stabilization
O Flashing Flashing Requires Calibration - follow calibration procedure
O O On Air SAFE - audible alarm enabled
O O Flashing Air SAFE - audible alarm permanently disabled
On On O Air Fail
O On Flashing Air Fail - Setback mode (remote horn mute activated)
On Flashing O Visor Open

Installation &
Calibration Guide
Monitor Panel Dimensions
Temperature Electronics Ltd. Unit 2, Wren Nest Road, Glossop SK13 8HB UK
T. [phone] F. [phone] E. [email protected] w. www.tel-uk.com
Monitor Panel Cutout Dimensions
(NOT shown to scale)
Airow Sensor Installation Diagram
For complete manual and product information, log on to www.tel-uk.com
5.83”
(148mm)
3.46”
(88mm)
1.57”
(40mm)
1.57”
(40mm)
4.65”
(118mm)
3.15”
(80mm)
4.96”
(126mm)
2 xing holes
2.5 mm diameter
for 2 #4 self-
tapping screws,
provided.